From ff4a9235feb4237854ff102c4dc7cf4645d6a116 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Thu, 26 Sep 2019 17:21:44 +0200
Subject: Add file API stub to sqfs data writer

Basically move the state tracking from the old data writer over to
the new one.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
 lib/sqfshelper/data_writer.c | 87 +++++---------------------------------------
 1 file changed, 9 insertions(+), 78 deletions(-)

(limited to 'lib/sqfshelper/data_writer.c')

diff --git a/lib/sqfshelper/data_writer.c b/lib/sqfshelper/data_writer.c
index 5c01cb8..ca47447 100644
--- a/lib/sqfshelper/data_writer.c
+++ b/lib/sqfshelper/data_writer.c
@@ -9,47 +9,17 @@
 #include "highlevel.h"
 #include "util.h"
 
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdio.h>
-
-static bool is_zero_block(unsigned char *ptr, size_t size)
-{
-	return ptr[0] == 0 && memcmp(ptr, ptr + 1, size - 1) == 0;
-}
-
-static int add_sentinel_block(sqfs_data_writer_t *data,
-			      sqfs_inode_generic_t *inode,
-			      uint32_t flags)
-{
-	sqfs_block_t *blk = calloc(1, sizeof(*blk));
-
-	if (blk == NULL) {
-		perror("creating sentinel block");
-		return -1;
-	}
-
-	blk->inode = inode;
-	blk->flags = flags;
-
-	return sqfs_data_writer_enqueue(data, blk);
-}
-
 int write_data_from_file(sqfs_data_writer_t *data, sqfs_inode_generic_t *inode,
 			 sqfs_file_t *file, size_t block_size, int flags)
 {
-	uint32_t blk_flags = SQFS_BLK_FIRST_BLOCK;
 	uint64_t filesz, offset;
-	size_t diff, i = 0;
 	sqfs_block_t *blk;
+	size_t diff;
 	int ret;
+	(void)flags;
 
-	if (flags & DW_DONT_COMPRESS)
-		blk_flags |= SQFS_BLK_DONT_COMPRESS;
-
-	if (flags & DW_ALLIGN_DEVBLK)
-		blk_flags |= SQFS_BLK_ALLIGN;
+	if (sqfs_data_writer_begin_file(data, inode, 0))
+		return -1;
 
 	sqfs_inode_get_file_size(inode, &filesz);
 
@@ -60,54 +30,15 @@ int write_data_from_file(sqfs_data_writer_t *data, sqfs_inode_generic_t *inode,
 			diff = filesz - offset;
 		}
 
-		ret = sqfs_file_create_block(file, offset, diff, inode,
-					     blk_flags, &blk);
+		ret = sqfs_file_create_block(file, offset, diff,
+					     NULL, 0, &blk);
 
 		if (ret)
 			return -1;
 
-		blk->index = i++;
-
-		if (is_zero_block(blk->data, blk->size)) {
-			sqfs_inode_make_extended(inode);
-			inode->data.file_ext.sparse += blk->size;
-			inode->num_file_blocks += 1;
-
-			inode->block_sizes[blk->index] = 0;
-			free(blk);
-			continue;
-		}
-
-		if (diff < block_size && !(flags & DW_DONT_FRAGMENT)) {
-			if (!(blk_flags & (SQFS_BLK_FIRST_BLOCK |
-					   SQFS_BLK_LAST_BLOCK))) {
-				blk_flags |= SQFS_BLK_LAST_BLOCK;
-
-				if (add_sentinel_block(data, inode,
-						       blk_flags)) {
-					free(blk);
-					return -1;
-				}
-			}
-
-			blk->flags |= SQFS_BLK_IS_FRAGMENT;
-
-			if (sqfs_data_writer_enqueue(data, blk))
-				return -1;
-		} else {
-			if (sqfs_data_writer_enqueue(data, blk))
-				return -1;
-
-			blk_flags &= ~SQFS_BLK_FIRST_BLOCK;
-			inode->num_file_blocks += 1;
-		}
-	}
-
-	if (!(blk_flags & (SQFS_BLK_FIRST_BLOCK | SQFS_BLK_LAST_BLOCK))) {
-		blk_flags |= SQFS_BLK_LAST_BLOCK;
-
-		if (add_sentinel_block(data, inode, blk_flags))
+		if (sqfs_data_writer_enqueue(data, blk))
 			return -1;
 	}
-	return 0;
+
+	return sqfs_data_writer_end_file(data);
 }
-- 
cgit v1.2.3